Excavator undercarriage



FIG. 1 is a top, front, and right-side isometric view of an excavator undercarriage showing the new design.

FIG. 2 is a top plan view of the excavator undercarriage.

FIG. 3 is a right-side elevation view of the excavator undercarriage.

FIG. 4 is a left-side elevation view of the excavator undercarriage.

FIG. 5 is a front elevation view of the excavator undercarriage; and,

FIG. 6 is a rear elevation view of the excavator undercarriage. 

CLAIM The ornamental design for an excavator undercarriage, as shown. 